STEADY-STATE EQUIVALENT CIRCUIT AND PERFORMANCE
When the IM is fed in the stator from a three-phase balanced power source, the three-phase currents produce a traveling field in the airgap. This field produces emfs both in the stator and in the rotor windings: E1 and E2s. A symmetrical cage in the rotor may be reduced to an equivalent three-phase winding. The frequency of E2s is f2.